龙门山地区中泥盆统观雾山组沉积相及其演化分析
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摘 要 以龙门山地区北川甘溪凉水洞剖面实测资料为基础,对中泥盆统观雾山组沉积相及其演化进行了 分析,认为观雾山组底部以碎屑岩沉积为主,主要发育河流相和无障壁滨岸相;碎屑岩之上发育碳酸盐岩台 地相和碳酸盐缓坡相。其中碳酸盐台地可划分为台地边缘生物礁、台地边缘浅滩和台地前缘斜坡等3种亚 相,碳酸盐缓坡可划分为浅水缓坡、深水缓坡等2种亚相;碳酸盐台地和碳酸盐缓坡可以在特定的环境下发 生相互转化,其识别标志主要有角砾礁灰岩和滑动变形构造。龙门山地区观雾山组经历了早期和晚期2个 沉积演化阶段,早期旋回底部为碎屑岩沉积、中上部以碳酸盐台地为主,晚期以碳酸盐缓坡为主。本研究为 龙门山地区观雾山组岩相古地理恢复提供了基础。 关键词 龙门山地区;中泥盆统;观雾山组;沉积相;环境演化 中图分类号:TE1213 文献标识码:A
61005第9)一国。家作E重者m点简ail研介:lif发:en李计gj凤划ie7杰课2,题@男1“6,北3教方.c授o砂m,岩博。型生铀研能究源生矿导产师基,从地事深沉部积探学测与技层术序示地范层(编学号研:2究01与8Y教F学C0工60作42。01地)”址部:分成研都究市成二果仙。桥东三路1号(邮编:
犃犫狊狋狉犪犮狋:BasedonthemeasureddataoftheBeichuanGanxiLiangshuidongsectionintheLongmenshanar ea,thesedimentaryfaciesandevolutionoftheMiddleDevonianGuanwushanFormationareanalyzed.Itis consideredthatthebottomoftheGuanwushanFormationisdominatedbyclasticrocks,andmainlythefluvial andandbarrierfreeshorefaciesaredeveloped;carbonateplatformfaciesandcarbonategentleslopefaciesare developedaboveclasticrocks.Amongthem,thecarbonateplatformscanbedividedintothreesubfaciesof platformmarginreef,platformmarginshoalandplatformforeslope;thecarbonategentleslopescanbedivided intoshallowwatergentleslopeandthedeepwaterone.Thecarbonateplatformandcarbonategentleslopecan betransformedintoeachotherinaparticularsedimentaryenvironment,andthemainidentificationmarksare thebrecciareeflimestoneandslidingdeformationstructure.TheGuanwushanFormationintheLongmenshan areahasexperiencedtwophasesofsedimentaryevolutionintheearlyandlatestages.Thebottomofearlycy cleiscomposedofclasticsediments,themiddleandupperpartsaredominatedbycarbonateplatform,andthe carbonateslopeisdominatedinthelatestage.Thisstudyprovidesthebasisforthelithofaciespaleogeographic recoveryoftheGuanwushanFormationintheLongmenshanarea. 犓犲狔狑狅狉犱狊:Lmoenngtamleenvsohlauntioanrea;MiddleDevonian;GuanwushanFormation;sedimentaryfacies;environ
李凤杰1,2 李佐强2 沈 凡2 赖雪莲2
(1.成都理工大学油气藏地质及开发工程国家重点实验室 四川成都 610059; 2.成都理工大学沉积地质研究院 四川成都 610059)
李凤杰,李佐强,沈凡,等.龙门山地区中泥盆统观雾山组沉积相及其演化分析[J].中国海上油气,2020,32(1):3241. LIFengjie,LIZuoqiang,SHENFan,etal.SedimentaryfaciesandevolutionanalysisoftheMiddleDevonianGuanwushanFormationinthe Longmenshanarea[J].ChinaOffshoreOilandGas,2020,32(1):3241.
犛犲犱犻犿犲狀狋犌犪狌狉犪狔狀犳狑犪狌犮犻狊犲犺狊犪狀犪狀犉犱狅犲狉狏犿狅犪犾狋狌犻狋狅犻狅狀狀犻狀犪狀狋犪犺犾犲狔狊犔犻狊狅狀狅犵犳犿狋犺犲犲狀狊犺犕犪犻狀犱犱犪犾狉犲犲犪犇犲狏狅狀犻犪狀
LIFengjie1,2 LIZuoqiang2 SHENFan2 LAIXuelian2
(1.犛狋犪狋犲犓犲狔犔犪犫狅狉犪狋狅狉狔狅犳犗犻犾牔犌犪狊犚犲狊犲狉狏狅犻狉犌犲狅犾狅犵狔犪狀犱犈狓狆犾狅犻狋犪狋犻狅狀,犆犺犲狀犵犱狌犝狀犻狏犲狉狊犻狋狔狅犳犜犲犮犺狀狅犾狅犵狔,犆犺犲狀犵犱狌,犛犻犮犺狌犪狀 610059,犆犺犻狀犪;2.犐狀狊狋犻狋狌狋犲狅犳犛犲犱犻犿犲狀狋犪狉狔犌犲狅犾狅犵狔,犆犺犲狀犵犱狌犝狀犻狏犲狉狊犻狋狔狅犳犜犲犮犺狀狅犾狅犵狔,犆犺犲狀犵犱狌,犛犻犮犺狌犪狀610059,犆犺犻狀犪)
第2302NAOFFSHOREOILANDGAS
VolFe.3b2.2 02N0o.1
文章编号:1673?1506(2020)01?0032?10
DOI:1011935/j.issn.1673?1506.2020.01.004
龙门山地区中泥盆统观雾山组沉积相及其演化分析
61005第9)一国。家作E重者m点简ail研介:lif发:en李计gj凤划ie7杰课2,题@男1“6,北3教方.c授o砂m,岩博。型生铀研能究源生矿导产师基,从地事深沉部积探学测与技层术序示地范层(编学号研:2究01与8Y教F学C0工60作42。01地)”址部:分成研都究市成二果仙。桥东三路1号(邮编:
犃犫狊狋狉犪犮狋:BasedonthemeasureddataoftheBeichuanGanxiLiangshuidongsectionintheLongmenshanar ea,thesedimentaryfaciesandevolutionoftheMiddleDevonianGuanwushanFormationareanalyzed.Itis consideredthatthebottomoftheGuanwushanFormationisdominatedbyclasticrocks,andmainlythefluvial andandbarrierfreeshorefaciesaredeveloped;carbonateplatformfaciesandcarbonategentleslopefaciesare developedaboveclasticrocks.Amongthem,thecarbonateplatformscanbedividedintothreesubfaciesof platformmarginreef,platformmarginshoalandplatformforeslope;thecarbonategentleslopescanbedivided intoshallowwatergentleslopeandthedeepwaterone.Thecarbonateplatformandcarbonategentleslopecan betransformedintoeachotherinaparticularsedimentaryenvironment,andthemainidentificationmarksare thebrecciareeflimestoneandslidingdeformationstructure.TheGuanwushanFormationintheLongmenshan areahasexperiencedtwophasesofsedimentaryevolutionintheearlyandlatestages.Thebottomofearlycy cleiscomposedofclasticsediments,themiddleandupperpartsaredominatedbycarbonateplatform,andthe carbonateslopeisdominatedinthelatestage.Thisstudyprovidesthebasisforthelithofaciespaleogeographic recoveryoftheGuanwushanFormationintheLongmenshanarea. 犓犲狔狑狅狉犱狊:Lmoenngtamleenvsohlauntioanrea;MiddleDevonian;GuanwushanFormation;sedimentaryfacies;environ
李凤杰1,2 李佐强2 沈 凡2 赖雪莲2
(1.成都理工大学油气藏地质及开发工程国家重点实验室 四川成都 610059; 2.成都理工大学沉积地质研究院 四川成都 610059)
李凤杰,李佐强,沈凡,等.龙门山地区中泥盆统观雾山组沉积相及其演化分析[J].中国海上油气,2020,32(1):3241. LIFengjie,LIZuoqiang,SHENFan,etal.SedimentaryfaciesandevolutionanalysisoftheMiddleDevonianGuanwushanFormationinthe Longmenshanarea[J].ChinaOffshoreOilandGas,2020,32(1):3241.
犛犲犱犻犿犲狀狋犌犪狌狉犪狔狀犳狑犪狌犮犻狊犲犺狊犪狀犪狀犉犱狅犲狉狏犿狅犪犾狋狌犻狋狅犻狅狀狀犻狀犪狀狋犪犺犾犲狔狊犔犻狊狅狀狅犵犳犿狋犺犲犲狀狊犺犕犪犻狀犱犱犪犾狉犲犲犪犇犲狏狅狀犻犪狀
LIFengjie1,2 LIZuoqiang2 SHENFan2 LAIXuelian2
(1.犛狋犪狋犲犓犲狔犔犪犫狅狉犪狋狅狉狔狅犳犗犻犾牔犌犪狊犚犲狊犲狉狏狅犻狉犌犲狅犾狅犵狔犪狀犱犈狓狆犾狅犻狋犪狋犻狅狀,犆犺犲狀犵犱狌犝狀犻狏犲狉狊犻狋狔狅犳犜犲犮犺狀狅犾狅犵狔,犆犺犲狀犵犱狌,犛犻犮犺狌犪狀 610059,犆犺犻狀犪;2.犐狀狊狋犻狋狌狋犲狅犳犛犲犱犻犿犲狀狋犪狉狔犌犲狅犾狅犵狔,犆犺犲狀犵犱狌犝狀犻狏犲狉狊犻狋狔狅犳犜犲犮犺狀狅犾狅犵狔,犆犺犲狀犵犱狌,犛犻犮犺狌犪狀610059,犆犺犻狀犪)
第2302NAOFFSHOREOILANDGAS
VolFe.3b2.2 02N0o.1
文章编号:1673?1506(2020)01?0032?10
DOI:1011935/j.issn.1673?1506.2020.01.004
龙门山地区中泥盆统观雾山组沉积相及其演化分析